package com.aier.user.action.pay.tenpay.util;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

/**
 * xml工具类
 * @author miklchen
 *
 */
public class XMLUtil {

    /**
     * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
     * @param strxml
     * @return
     * @throws JDOMException
     * @throws IOException
     */
    public static Map doXMLParse(String strxml) {
        if(null == strxml || "".equals(strxml)) {
            return null;
        }
        
        Map m = new HashMap();
        InputStream in = HttpClientUtil.String2Inputstream(strxml);
        SAXBuilder builder = new SAXBuilder();
        Document doc = null;
        try {
            doc = builder.build(in);
        } catch (JDOMException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        if (null != doc) {
            Element root = doc.getRootElement();
            List list = root.getChildren();
            Iterator it = list.iterator();
            while(it.hasNext()) {
                Element e = (Element) it.next();
                String k = e.getName();
                String v = "";
                List children = e.getChildren();
                if(children.isEmpty()) {
                    v = e.getTextNormalize();
                } else {
                    v = XMLUtil.getChildrenText(children);
                }
                
                m.put(k, v);
            }
        }
        
        //关闭流
        try {
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        return m;
    }
    
    /**
     * 获取子结点的xml
     * @param children
     * @return String
     */
    public static String getChildrenText(List children) {
        StringBuffer sb = new StringBuffer();
        if(!children.isEmpty()) {
            Iterator it = children.iterator();
            while(it.hasNext()) {
                Element e = (Element) it.next();
                String name = e.getName();
                String value = e.getTextNormalize();
                List list = e.getChildren();
                sb.append("<" + name + ">");
                if(!list.isEmpty()) {
                    sb.append(XMLUtil.getChildrenText(list));
                }
                sb.append(value);
                sb.append("</" + name + ">");
            }
        }
        
        return sb.toString();
    }
    
    /**
     * 获取xml编码字符集
     * @param strxml
     * @return
     * @throws IOException 
     * @throws JDOMException 
     */
    public static String getXMLEncoding(String strxml) {
        InputStream in = HttpClientUtil.String2Inputstream(strxml);
        SAXBuilder builder = new SAXBuilder();
        Document doc = null;
        try {
            doc = builder.build(in);
            in.close();
        } catch (JDOMException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return (String)doc.getProperty("encoding");
    }
    
    
}
